Datasheet

LTC3450
2
3450fa
V
IN
, SW.......................................................... –0.3 to 7V
SHDN, MODE................................................. –0.3 to 7V
V
OUT
..........................................................................
–0.3 to 5.5V
V
NEG
........................................................................
–17V to 0.3V
Operating Temperature Range
LTC3450E (Note 4) ............................. –40°C to 85°C
Storage Temperature Range ................. –65°C to 125°C
ORDER PART
NUMBER
T
JMAX
= 125°C, θ
JA
= 68°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC3450EUD
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1) (Referred to GND)
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.6V, V
OUT
= 5.2V unless otherwise noted.
16 15 14 13
5 6 7 8
TOP VIEW
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
EXPOSED PAD IS V
NEG
(PIN 17)
MUST BE SOLDERED TO PCB
9
10
11
12
17
4
3
2
1C3
+
C3
–
V
NEG
MODE
V2X
C1
+
C1
–
GND
V
INV
V3X C2
+
C2
–
SHDN
V
IN
V
OUT
SW
UD PART MARKING
LAAC
PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range ● 1.5 4.6 V
V
IN
Quiescent Supply Current MODE = V
IN
75 130 µA
V
OUT
Quiescent Supply Current MODE = V
IN
80 µA
V
IN
Quiescent Supply Current MODE = GND 30 50 µA
V
OUT
Quiescent Supply Current MODE = GND 13 µA
V
IN
Quiescent Current SHDN = GND, V
OUT
OPEN 0.01 2 µA
5V Boost Regulator
V
OUT
Output Voltage Load on V
OUT
= 5mA 5.049 5.100 5.151 V
V
OUT
Efficiency Load on V
OUT
= 5mA, (Note 2) 90 %
V
OUT
Maximum Output Current L = 47µH, (Note 2) 11 mA
Switch Current Limit 90 120 mA
Switching Frequency—Boost MODE = V
IN
550 kHz
Switching Frequency—Boost MODE = GND 15.62 kHz
Charge Pumps
V2X Output Voltage Load on V2X = 100µA ● 9.792 10.1 10.608 V